flow: fix over-tightened swerv_wrapper metrics

Re-ran update_rules with pr-head artifacts to widen bounds that were
over-tightened from pr-merge results. Manually kept globalroute__timing__setup__ws
at -0.398 to cover both pr-head (-0.146) and pr-merge (-0.298) observations.

designs/nangate45/swerv_wrapper/rules-base.json updates:
| Metric                                        | Old      | New      | Type     |
| ------                                        | ---      | ---      | ----     |
| cts__timing__setup__tns                       |    -8.83 |    -84.2 | Failing  |
| globalroute__timing__setup__ws                |   -0.246 |   -0.398 | (kept)   |
| globalroute__timing__setup__tns               |    -7.17 |    -75.8 | Failing  |
| detailedroute__route__wirelength              |  4491246 |  5599467 | Failing  |
| finish__timing__setup__tns                    |   -0.853 |    -87.5 | Failing  |

Signed-off-by: Jaehyun Kim <jhkim@precisioninno.com>

Author: jhkim-pii

flow/designs/nangate45/swerv_wrapper/rules-base.json

@@ -32,7 +32,7 @@
         "compare": ">="
     },
     "cts__timing__setup__tns": {
-        "value": -8.83,
+        "value": -84.2,
         "compare": ">="
     },
     "cts__timing__hold__ws": {
@@ -52,7 +52,7 @@
         "compare": ">="
     },
     "globalroute__timing__setup__tns": {
-        "value": -7.17,
+        "value": -75.8,
         "compare": ">="
     },
     "globalroute__timing__hold__ws": {
@@ -64,7 +64,7 @@
         "compare": ">="
     },
     "detailedroute__route__wirelength": {
-        "value": 4491246,
+        "value": 5599467,
         "compare": "<="
     },
     "detailedroute__route__drc_errors": {
@@ -84,15 +84,15 @@
         "compare": ">="
     },
     "finish__timing__setup__tns": {
-        "value": -0.853,
+        "value": -87.5,
         "compare": ">="
     },
     "finish__timing__hold__ws": {
-        "value": -0.103,
+        "value": -0.1,
         "compare": ">="
     },
     "finish__timing__hold__tns": {
-        "value": -0.403,
+        "value": -0.4,
         "compare": ">="
     },
     "finish__design__instance__area": {